oj.uz

Submission #831715

# Submission time Handle Problem Language Result Execution time Memory
831715 2023-08-20T12:36:50 Z green_gold_dog Group Photo (JOI21_ho_t3) C++17
64 / 100
 5000 ms 321132 KB 
//#pragma GCC optimize("Ofast")
//#pragma GCC target("avx,avx2,sse,sse2,sse3,ssse3,sse4,abm,popcnt,mmx")
#include <bits/stdc++.h>

using namespace std;

typedef int ll;
typedef double db;
typedef long double ldb;
typedef complex<double> cd;

constexpr ll INF64 = 9000000000000000000, INF32 = 2000000000, MOD = 1000000007;
constexpr db PI = acos(-1);
constexpr bool IS_FILE = false, IS_TEST_CASES = false;

random_device rd;
mt19937 rnd32(rd());
mt19937_64 rnd64(rd());

template<typename T>
bool assign_max(T& a, T b) {
	if (b > a) {
		a = b;
		return true;
	}
	return false;
}

template<typename T>
bool assign_min(T& a, T b) {
	if (b < a) {
		a = b;
		return true;
	}
	return false;
}

template<typename T>
T square(T a) {
	return a * a;
}

template<>
struct std::hash<pair<ll, ll>> {
	ll operator() (pair<ll, ll> p) {
		return ((__int128)p.first * MOD + p.second) % INF64;
	}
};

struct segment_tree {
	vector<ll> tree;
	ll size;
	segment_tree(vector<ll> a = vector<ll>(0, 0)) {
		size = 1;
		while (size < a.size()) {
			size *= 2;
		}
		tree.resize(size * 2, 0);
		a.resize(size, 0);
		build(1, 0, size, a);
	}
	ll build(ll v, ll l, ll r, vector<ll>& a) {
		if (r - l == 1) {
			return tree[v] = a[l];
		}
		ll mid = (l + r) / 2;
		return tree[v] = build(v * 2, l, mid, a) + build(v * 2 + 1, mid, r, a);
	}
	ll get(ll l, ll r) {
		return get(1, 0, size, l, r);
	}
	ll get(ll v, ll l, ll r, ll ql, ll qr) {
		if (ql <= l && r <= qr) {
			return tree[v];
		}
		if (qr <= l || r <= ql) {
			return 0;
		}
		ll mid = (l + r) / 2;
		return get(v * 2, l, mid, ql, qr) + get(v * 2 + 1, mid, r, ql, qr);
	}
};

void solve() {
	ll n;
	cin >> n;
	vector<ll> pos(n);
	for (ll i = 0; i < n; i++) {
		ll x;
		cin >> x;
		x--;
		pos[x] = i;
	}
	vector<segment_tree> all;
	for (ll i = 0; i <= n; i++) {
		vector<ll> now(n);
		for (ll j = 0; j < n; j++) {
			now[j] = pos[j] > i;
		}
		all.emplace_back(now);
	}
	vector<ll> dp(n, INF32);
	dp[0] = 0;
	for (ll i = 1; i < n; i++) {
		ll now = 0;
		for (ll j = i - 1; j >= 0; j--) {
			now += all[pos[j + 1]].get(0, j + 1);
			//for (ll k = 0; k <= j; k++) {
			//	if (pos[k] > pos[j + 1]) {
			//		now++;
			//	}
			//}
			ll x = all[pos[j + 1]].get(j + 2, i + 1);
			now += x;
			now -= (i - j - 1) - x;
			//for (ll k = j + 2; k <= i; k++) {
			//	if (pos[k] > pos[j + 1]) {
			//		now++;
			//	} else {
			//		now--;
			//	}
			//}
			assign_min(dp[i], now + dp[j]);
		}
		now = 0;
		for (ll k = 0; k <= i; k++) {
			now += k - all[pos[k]].get(0, k);
			//for (ll l = 0; l < k; l++) {
			//	if (pos[k] > pos[l]) {
			//		now++;
			//	}
			//}
		}
		assign_min(dp[i], now);
	}
	cout << dp.back() << '\n';
}

int main() {
	if (IS_FILE) {
		freopen("", "r", stdin);
		freopen("", "w", stdout);
	}
    	ios_base::sync_with_stdio(false);
    	cin.tie(0);
    	cout.tie(0);
	ll t = 1;
	if (IS_TEST_CASES) {
		cin >> t;
	}
	for (ll i = 0; i < t; i++) {
		solve();
	}
}

Compilation message

Main.cpp:12:22: warning: overflow in conversion from 'long int' to 'll' {aka 'int'} changes value from '9000000000000000000' to '-494665728' [-Woverflow]
   12 | constexpr ll INF64 = 9000000000000000000, INF32 = 2000000000, MOD = 1000000007;
      |                      ^~~~~~~~~~~~~~~~~~~
Main.cpp: In constructor 'segment_tree::segment_tree(std::vector<int>)':
Main.cpp:55:15: warning: comparison of integer expressions of different signedness: 'll' {aka 'int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   55 |   while (size < a.size()) {
      |          ~~~~~^~~~~~~~~~
Main.cpp: In function 'int main()':
Main.cpp:141:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  141 |   freopen("", "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~
Main.cpp:142:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  142 |   freopen("", "w", stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 328 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 336 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 328 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 336 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 336 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 0 ms 332 KB Output is correct

Subtask #3
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 328 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 336 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 336 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 0 ms 332 KB Output is correct
21 Correct 4 ms 724 KB Output is correct
22 Correct 4 ms 716 KB Output is correct
23 Correct 4 ms 724 KB Output is correct
24 Correct 4 ms 712 KB Output is correct
25 Correct 5 ms 724 KB Output is correct
26 Correct 4 ms 724 KB Output is correct
27 Correct 4 ms 724 KB Output is correct
28 Correct 4 ms 716 KB Output is correct
29 Correct 5 ms 724 KB Output is correct
30 Correct 4 ms 692 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 328 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 336 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 336 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 0 ms 332 KB Output is correct
21 Correct 4 ms 724 KB Output is correct
22 Correct 4 ms 716 KB Output is correct
23 Correct 4 ms 724 KB Output is correct
24 Correct 4 ms 712 KB Output is correct
25 Correct 5 ms 724 KB Output is correct
26 Correct 4 ms 724 KB Output is correct
27 Correct 4 ms 724 KB Output is correct
28 Correct 4 ms 716 KB Output is correct
29 Correct 5 ms 724 KB Output is correct
30 Correct 4 ms 692 KB Output is correct
31 Correct 74 ms 6792 KB Output is correct
32 Correct 84 ms 6740 KB Output is correct
33 Correct 74 ms 6792 KB Output is correct
34 Correct 106 ms 6816 KB Output is correct
35 Correct 72 ms 6800 KB Output is correct
36 Correct 76 ms 6700 KB Output is correct
37 Correct 75 ms 6732 KB Output is correct
38 Correct 72 ms 6740 KB Output is correct
39 Correct 73 ms 6728 KB Output is correct
40 Correct 80 ms 6740 KB Output is correct

Subtask #5
0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 328 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 336 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 336 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 0 ms 332 KB Output is correct
21 Correct 4 ms 724 KB Output is correct
22 Correct 4 ms 716 KB Output is correct
23 Correct 4 ms 724 KB Output is correct
24 Correct 4 ms 712 KB Output is correct
25 Correct 5 ms 724 KB Output is correct
26 Correct 4 ms 724 KB Output is correct
27 Correct 4 ms 724 KB Output is correct
28 Correct 4 ms 716 KB Output is correct
29 Correct 5 ms 724 KB Output is correct
30 Correct 4 ms 692 KB Output is correct
31 Correct 74 ms 6792 KB Output is correct
32 Correct 84 ms 6740 KB Output is correct
33 Correct 74 ms 6792 KB Output is correct
34 Correct 106 ms 6816 KB Output is correct
35 Correct 72 ms 6800 KB Output is correct
36 Correct 76 ms 6700 KB Output is correct
37 Correct 75 ms 6732 KB Output is correct
38 Correct 72 ms 6740 KB Output is correct
39 Correct 73 ms 6728 KB Output is correct
40 Correct 80 ms 6740 KB Output is correct
41 Execution timed out 5056 ms 321132 KB Time limit exceeded
42 Halted 0 ms 0 KB -